[U-Boot] [PATCH 0/3] sunxi: Enable VGA output on Hummingbird A31

[Hans de Goede]

Hi,

On 12-01-15 11:02, Chen-Yu Tsai wrote:
> Hi Hans, Ian,
>
> This series enables the VGA output on the Hummingbird A31. The VGA output
> is driven from LCD0, through an external DAC that's powered up by toggling
> pin PH25.
>
> Patch 1 allows selecting CONFIG_VIDEO_VGA_VIA_LCD on sun6i and sun8i.
> These 2 platforms do not have builtin TV encoders, and some vendor may
> use an external DAC to support VGA.
>
> Patch 2 adds support for toggling a GPIO pin as part of the video init
> sequence to power up the DAC
>
> Patch 3 updates the Hummingbird A31 defconfig to enable VGA output.
>
> I have one question about the VGA_VIA_LCD code in general. The color depth
> is forced to 18. Is this necessary? Can we make it configurable? I haven't
> tried displaying pictures so I don't know if it makes a visible difference.
>
> Also with the VGA output on my Hummingbird A31, I get greenish flashing
> pixels where it should be black, like in and between characters. Once
> booted in to the kernel this disappears, and I get a nice console with
> simplefb. Kind of weird.
>
>
> Cheers
> ChenYu

Thanks, applied to u-boot-sunxi/next (with the discussed fix), while at
it I've also fixed the whitespace errors you pointed out in
<CAGb2v65Y26fTjcoOcWUZLG0+BR+UrWJ4HCL5d1V7ovn6TA6WTw at mail.gmail.com>

Regards,

Hans

>
>
> Chen-Yu Tsai (3):
>    sunxi: video: Allow external DACs for VGA on platforms without TV
>      encoders
>    sunxi: video: Add support for external DAC enable pin
>    sunxi: Hummingbird_A31_defconfig: Enable VGA output through external
>      DAC
>
>   board/sunxi/Kconfig               | 10 +++++++++-
>   configs/Hummingbird_A31_defconfig |  2 ++
>   drivers/video/sunxi_display.c     | 18 ++++++++++++++++++
>   3 files changed, 29 insertions(+), 1 deletion(-)
>